Intake sounds awesome in cold air?

Damage Inc · 11-15-2011, 08:37 PM

Now that the weather is cold and crisp, the car sounds even meaner. Driving to the office in the AM, I"ll open the sunroof to hear the growl.

Is it me, or does the car growl a bit more when the air is cold?

prichards516 · 11-15-2011, 08:39 PM

what kind of intake do you have?

Damage Inc · 11-15-2011, 08:44 PM

stock

Ateam · 11-15-2011, 08:52 PM

You are so right but I have no idea why! I know why you make power with more dense oxygen in cold air being sucked in but not sure why it sounds better. Maybe the acoustics of cold dense air is different than hot less dense air?

blackbeast535 · 11-15-2011, 08:54 PM

I'm glad to see that I am not the only one with the window down, sunroof open and heated seats on. I love hearing the sounds of this spectacular car.

RizOne · 11-15-2011, 09:10 PM

I think it is the humidity level that makes the intake sound better. The less moisture and the dryer the air the better the acoustic properties and how it resonates through the intake. My acoustic guitar always sounds better when there is less humidity also.

AM1N · 11-16-2011, 12:12 AM

90 degrees = 30 HP loss. 60 degrees = 30 HP gain!

Gjm127 · 11-16-2011, 01:28 AM

it's the same with all engine types IMO, I do hear a meaner exhaust note when the weather is cold.

M3PO · 11-16-2011, 11:50 AM

Quote:

Originally Posted by Ateam

You are so right but I have no idea why! I know why you make power with more dense oxygen in cold air being sucked in but not sure why it sounds better. Maybe the acoustics of cold dense air is different than hot less dense air?

My guess is that it's due to the fact that sound waves travel better in denser fluids. Similar to how sound can travel long distances underwater. When the air is more dense, the transmission of the intake sounds is more efficient and they will dissipate just a little bit less.

Ateam · 11-16-2011, 12:37 PM

Quote:

Originally Posted by AM1N

90 degrees = 30 HP loss. 60 degrees = 30 HP gain!

Arizona in 115 degrees and only 91 octane really is a pisser in summer!

dibxna · 11-16-2011, 03:05 PM

Quote:

Originally Posted by Ateam

Arizona in 115 degrees and only 91 octane really is a pisser in summer!

amen to that man. cars in our heat are just sluggish at any speed during the summer.

you in phx area?

11-15-2011, 08:37 PM	#1
Damage Inc Lieutenant Colonel 790 Rep 1,925 Posts Drives: 2017 M2 Join Date: Apr 2005 Location: Nashville iTrader: (1)	Intake sounds awesome in cold air? Now that the weather is cold and crisp, the car sounds even meaner. Driving to the office in the AM, I"ll open the sunroof to hear the growl. Is it me, or does the car growl a bit more when the air is cold? __________________ Current: 17 OG M2 / R8 Performance Past Performance Cars: 01 M3, 05 M3, 06 M5, 08 M6, 08 M3, 11 M3, 13 M3, 15 M3, 911 C4S, 911 GTS, 17 M2,R8 V8, R8 RWS
	Appreciate 0 Tweet Quote

11-15-2011, 08:39 PM	#2
prichards516 Lieutenant 30 Rep 482 Posts Drives: e92 M3 zcp Join Date: Sep 2010 Location: Long Island, NY iTrader: (2)	what kind of intake do you have?
	Appreciate 0 Quote

11-15-2011, 08:44 PM	#3
Damage Inc Lieutenant Colonel 790 Rep 1,925 Posts Drives: 2017 M2 Join Date: Apr 2005 Location: Nashville iTrader: (1)	stock __________________ Current: 17 OG M2 / R8 Performance Past Performance Cars: 01 M3, 05 M3, 06 M5, 08 M6, 08 M3, 11 M3, 13 M3, 15 M3, 911 C4S, 911 GTS, 17 M2,R8 V8, R8 RWS
	Appreciate 0 Quote

11-15-2011, 08:52 PM	#4
Ateam Banned 88 Rep 1,105 Posts Drives: M3 Join Date: Sep 2011 Location: USA iTrader: (0)	You are so right but I have no idea why! I know why you make power with more dense oxygen in cold air being sucked in but not sure why it sounds better. Maybe the acoustics of cold dense air is different than hot less dense air?
	Appreciate 0 Quote

11-15-2011, 08:54 PM	#5
blackbeast535 Private First Class 23 Rep 145 Posts Drives: 2008 M3 6MT Jerez Black Join Date: Aug 2011 Location: MD iTrader: (0)	I'm glad to see that I am not the only one with the window down, sunroof open and heated seats on. I love hearing the sounds of this spectacular car. __________________ E90 M3 Jerez Black/Bamboo Beige 6MT - BMW CCA Dinan Rear Exhaust, Secondary Cat Delete, Dinan High Flow Carbon Fiber Intake, IND Painted Reflectors, BMW Edition Grills
	Appreciate 0 Quote

11-15-2011, 09:10 PM	#6
RizOne Private First Class 60 Rep 179 Posts Drives: F10 M5 Join Date: Oct 2011 Location: Nj iTrader: (0)	I think it is the humidity level that makes the intake sound better. The less moisture and the dryer the air the better the acoustic properties and how it resonates through the intake. My acoustic guitar always sounds better when there is less humidity also.
	Appreciate 0 Quote

11-16-2011, 12:12 AM	#7
AM1N Private First Class 17 Rep 157 Posts Drives: VO 1M Join Date: Oct 2011 Location: North Jersey iTrader: (0)	90 degrees = 30 HP loss. 60 degrees = 30 HP gain!
	Appreciate 0 Quote

11-16-2011, 01:28 AM	#8
Gjm127 Lieutenant 40 Rep 544 Posts Drives: BMW 435i xDrive M-Sport Join Date: Nov 2011 Location: Montreal, QC iTrader: (0) Garage List 2014 BMW F32 435i x ... [9.50] 2009 BMW E92 328i x ... [9.66]	it's the same with all engine types IMO, I do hear a meaner exhaust note when the weather is cold.
	Appreciate 0 Quote